Lock



N. B. HURD July 16, 1940.

LOCK,

Filed May 5, 1939 2 Sheets-Sheet 1 s m, H NE W EU 0 W T M MY EB m July 16, 1940.

N. B. HURD LOCK Filed May 5, 1939 2 Sheets+Sheet 2 INVENTOR N B. Ill/RD A w w ATTORNEYS Patented July 16, 1940 UNITED STATES PATENT OFFICE it 2.201.984 LOCK h Norman B.,Hurd, Newington, Coma, assignor to The American Hardware, I Corporation, New Britain, Gonn., a corporation of Connecticut Application May 5,1939, Serial No.271,873

Claims.

My invention relates to corridor locks, especially useful for-hotel guest rooms, steamship staterooms, and the like. The lock is designed'to be operated to unlock the door by either. one of 5 two different keys, one to' be held by the guest occupying the room and which I will term the guest key, the other to be held by the chambermaid or room stewart and which I will call the "servants key. g

The'object of the present invention is to provide certain new and useful features of constructlon whereby when the room has been locked by the indoor locking means such as the thumbturn, the door cannot be unlocked by the servants key. A master key may of course be provided to function at all times with the locks of a plurality of rooms.

In the accompanying drawings- Fig. 1 is a side elevation of my improved lock, with the cap removed, and showing only such parts of the lock as are necessary to an understanding of my invention;

Fig. 2 is a similar view showing certain parts in a different position and also showing part of the removable cap;

Fig. 3 is a relatively enlarged, vertical crosssection of the upper portion ofthe lock, said view being taken on the plane of the cylinder axis; h

Fig. 4 is a side elevation of a part of the inside of the cap and associated parts.

I have shown and will describe only one pre ferred form of my invention.

l is a lock case. 2 is' a removable cap. 3 is a spring projected latch-bolt mounted as usual in the face-plate 4. 5 is a knob actuated latch retracting member. This member 5 may be pressed back to retract the latch bolt by means'of a knob actuated inside roll-back 6 or by a knob actuated outside roll-back I. A so-called night latch dog 8 is provided for clogging the outside rollback by pushing in the press button 8 in the face-plate. This dog 8 is released by means of another button 8" having a walking beam connection 8" with said dog'8. '9 is a key operated latch retracting bell crank lever pivoted at '9'. The lower end of this lever stands in front of a plate 3' on the tail of the latch-bolt so that when the lever is operated by a key controlled means the latch-bolt 3 may be retracted against the'te'nsion of its spring. The upper end of this levers stands in the path of a key controlled roll-back H) .of {a cylinder'lock. II is another lever pivoted intermediate its length on the pivot 9. I2 is another lever mounted intermediateits length on a pivot, I22 I3 is a link connecting the lower ends of the levers |ll2. I3 is an arm projecting upwardly from this link, while 9" is a stud on the side of the lever 9 for engaging the arm [3 at certain times and for the purpose later described. v The upper end of the lever 12 is cut back at one 5 side to provide side clearance for the key controlled roll-back l0. The roll-back l0 always moves in a plane coincident with the upper end of the bell crank lever 9. I4 represents the body of the cylinder lock or the like designed to be operated by the usual so-called fiat key. The rollback I0 carries on its outer side a slide 15 which in turn carries on itsoutside a check l5; Normally this slide is spring repressed so that said check will'stand retracted in the position shown in Fig. 1. However, when a long key is introduced into the'cylinder look as shown in Fig. 3, its inclined end will engage the slide [5 and push the check I5 radiallyoutwar'd to the position indicated in Figs. 2, 3 and 4. In the present instance this long key is the servants key. My inventionv contemplates suitable means to prevent the holder of this key from operating the lock, provided it has been locked by an indoor locking means such as a thumb-turn. I6 is a thumb- 25 turn'roll-back hub mounted on the inside of the cap preferably in alignment with the axis of the cylinder lock 'plugr I'l is a thumb-turn for operating the hub l6. I8 is a roll-back mounted on the hub I6. ing in the slot is a stud, II on the upper end or lever ll. Now, assuming the roll-back I8 is rotated from the position shown in Fig. 1 to that shown {in Fig. 2, its'movement will shift the linkage comprising the parts -42-13 from the 35 position shown in Fig. 1 to that shown in Fig. 2, inwhich position the upper end of the lever l2 will stand inthe path of movement of the check l5 s'o'that the servant's key (shown in Fig. 3) cannot turn far enough to reverse the linkage 'and retract the latch-bolt. The guest key, being shorter (see dotted lines, Fig. 3), will not project the check Ill-'- and hence the roll-back l0 may be turned thereby'sufficiently to cause the same to engage the upper end of the lever 9 and swing the lower end rearwardly sufficiently to retract the latch-bolt. During this movement the stud 9' will engage the arm I3 and shift the linkage from the position shown in Fig. 2 to that shown in Fig. 1. It will be noted that when the linkage stands. in the undogging position shown in Fig. 1, the end of the link [3 stands close to the rear of the .night latch button 8". Now, if the thumbturn I1 is operated to shift the linkage to the dogging position shown in Fig, 2, said link l3 will This roll-back has a slot and standpress the button 8" outwardly and, through the walking beam connection 8", will force the dog 8 into position to dog the outside knob roll-back 1. Thus, under such conditions the outer knob is dogged so that the room cannot be entered by turning the outside knob. If the door is closed and locked in this manner, the guest key (or master key) may be used to operate the linkage and retract the latch-bolt while still leaving the outside knob dogged until released by pressing in the night latch button 8".

do is to dog the outer knob roll-back 1 by means of the thumb-turn I! which will throw the linkage to the position shown in Fig. 2, wherein th servants key will be inefiective. Unless it is de sired to exclude the servant the guest would look his door by simply pressing in the button 8' in the face-plate of the lock.

Operation: Assuming the lock is used on a hotel bedroom door or a stateroom door and that the dogging mechanism is 01f, the room may be freely entered and left by simply operating the usual outside and indoor knobs, respectively. Assuming the guest leaves his room and wishes to leave it locked, he simply throws on the night latch dog 8 for the outer knob. The room may now be entered by the use of either the guest key or the servants key, since at. such time the dog 82 will be in its off position. It should be observed that the operation of either of these keys under this condition will not disturb the position of the dog 8 for locking the outer knob. If the dog 8 is off and the room is occupied, the occupant may look the door by means of the inside thumb-turn IT. This will not only have the effect of throwing the night latch dog 8 to the on position locking the outer knob, but it W111 also throw the dog I2 into its blocking position to prevent latch retraction by means of the ser vants key, thereby insuring the occupant of privacy.

I have described my invention in its preferred form but I fully realize that certain modifications and changes may be made without departing from the spirit or scope of theigryention'by'slight changes in design or the substitution of known equivalents for various parts.

vWhat I claim is: r

1. In a door lock of the charatth described, a spring-projected latch-bolt, independent rollbacks for inside and outside knob actuation for retracting the latch-bolt, a night latch dog for the outside roll-back, a key actuated'roll-back, with means operable thereby to retract said latch-bolt by either of two difierently shaped keys, a second dogging device operable from the indoor side of the lock to block at will the retraction of said latch-bolt by one of said keys when said device is in one position, and a check movably mounted on said key actuated roll-back and. movable by the last mentioned key into position .to be blocked by said second dogging device:

2. In a door lock of the character described, a spring projected latch-bolt, independent rollbacks for inside and outside knob actuation for retracting the latch-bolt, a night latch dog for the. outside roll-back, a key actuated roll-back, with 'means operable thereby to retract said latch-bolt by either of two differently shaped keys, a second dogging device operable from the indoor side of the lock to block at will the retraction of said latch-bolt 'by one of said keys If, however, the guest wishes to leave the room and wishes to deny -the servant entrance in his absence, all he needs to when said device is in one position, a check movably mounted on said key actuated roll-back and movable by the last mentioned'key into position to be blocked by said second dogging device, said second dogging means coacting with the night latch dog for the outer knob to move the same to the on position when the dog for said key actuated roll-back is moved to the on position.

3. In a lock of the character described, a spring 'projected'latch-bolt, two latch "retracting roll-backs for independent operation by inside and outside knobs respectively, a night latch dog for the roll-back for the outer knob only, a key operated mechanism including a roll-back for retracting the latch-bolt from. the outdoor side by operable from the indoor side of the lock to block retraction of the latch-bolt by one of said keys when the outside knob roll-back has been dogged, said means including a device co-acting with the night latch dog to throw it fon simultaneously with the clogging of the key operated roll-back.

. 4. In a door lock of the-character described, a spring projected latch-bolt, two independent latch retracting roll-backs for operation byjnside and outside knobs respectively, a night latch dog for the outside roll-back, a key actuated rollback, with means operable thereby to retract:

said latch by either of two diiferentlyshaped keys, one being longer than the'other, an inside manually operable device movableto a position to block the retraction of the'latch-bolt by said key controlled roll-back, a checking device carried bysaid roll-back and movable by the longer key into position to be stopped by the blocking meanswhen said roll-back is turned and'before it has moved sufi'iciently far to retractsaidlatch.

5. In a lock of the character described, a spring .projected latch-bolt, a key operated means for retracting said latchbolt andcomprising a cylinder lock for .the outdoor side, a rollebac-k carried thereby and bearing a movable checking device thereon normally standing in a non-checking position, said cylinder lock roll-back being operable by two differently shaped keys, -sa1d checking device on said roll-back being unaffected by the use of one of said keys butbeing shifted to its checking position by the use of the other key, a manually controlled dogging mechanism operable from the indoor side of the lock to move said dogging mechanism into the path of movement of said checking device to stop the movement of said cylinder roll-back when operated by the last mentioned key beforesaid'rol-lback has reached thelatch-bolt retracting posie tion.

6. In a lock of the character described, a spring projected latch-bolt, a key operated means for retracting said latch-bolt and comprising' a Cylinder lock for the outdoor side, a roll-back carried thereby and bearing a movable checking device thereon normally standing ina non-check.- ing position, said cylinder lock roll-back being operable by two diiTerently shaped; keys, said checking device on said roll-back being unaifectedby the use of one of, said keys butv being either of two differently shaped keys, with means I "mitsaiidlatch-boltto be i retracted fromeither -7 the outdoor or indoor side of the lock and with a night latch dogging means to prevent at will the retraction of the latch-bolt from the outdoor side excepting by said cylinder roll-back.

'7 In a lock of the character described, a spring projected latch-bolt, a key operated means for retracting said latch-bolt and comprising a cylinder lock for the outdoor side, a roll-back carried thereby and bearing a movable checking de-- ated by the last mentioned key before said rollback has reached the latch-bolt retracting position, with other roll-back mechanism to permit said latch-bolt to be retracted from either the.

outdoor or indoor side of the lock and with a night latch dogging means to prevent at will the retraction of the latch bolt from the outdoor side excepting by said cylinder roll-back, said last mentioned night latch dogging means being thrown to its on position simultaneously with the throwing on of the dogging mechanism to block the key operated roll-back. v

8. In a door lock of the character described, a case having a face-plate, a spring projected latch-bolt, independent roll-backs for inside and outside manual actuation for retracting the latch-bolt, a dog to block the turning of the outside roll-back, with means in the face-plate to operate said dog, a key actuated roll-back, with means operable thereby to retract said latchbolt under such conditions from the outside of the door by either of two differently shaped keys, and a second means operable from the indoor side of the lock for throwing on said dog to block the retraction of said latch-bolt by one of said keys, said first mentioned means cooperating with said second means to throw off said dog.

9. In a lock of the character described, a lock case having a face-plate, a spring projected latch-bolt, two latch retracting roll-backs for independent operation by inside and outside knobs respectively, a night latch dog for the rollback for the outer knob only with means accessible in the face-plate to operate said dog, akey operated mechanism incuding a roll-back for retracting the latch-bolt from the outdoor side by either of two differently shaped keys, with a second means operable from the indoor side of the lock to dog the outside knob roll-back and to also block retraction of the latch-bolt by one of said keys when the outside knob roll-back has been dogged by said second means,

' 10. In a door look, a case having a face-plate, a spring latch-bolt projecting through said faceplate, separate roll-backs for retracting said latch from the indoor or outdoor side of said look, a dog for the roll-back for outdoorlatch retraction, means operable in the face-plate for dogging or freeing said roll-back, key operated mechanism for retracting said latch from the outdoor side, and a second means operable at the indoor side of the lock and coacting with the first-mentioned vdogging means for moving the same into dogging position and at the same time blocking the retraction of said latch-bolt by one of said keys;

NORMAN B. I-IURD. 

